Solution:
According to the problem, we get the following diagram:
now, by cross-multiplication, we get:
(40)(6) = x(10)
solving for x, we get:
[tex]x\text{ =}\frac{(40)(6)}{10}[/tex]
this is equivalent to:
[tex]x\text{ =}\frac{(40)(6)}{10}=24[/tex]
so that, we can conclude that the correct answer is:
24
